A piece of transparent material specifically designed to be placed directly in front of a dial or scale to protect it from foreign matter. It is cut to size and may include a frame. It may have an index line or other marking. See also window, observation; and dial, scale.
Classification: Clock or watch glass; glasses for noncorrective spectagles not optically worked; hollow glass spheres and their segments for the mnfctr ofsuch glasses
NSN 5855-01-645-0531
NSN 4140-01-641-1855
NSN 5945-01-555-8373
NSN 7035-01-279-7281
NSN 5895-00-205-2747
NSN 6135-00-715-4001
NSN 6130-00-901-0167
NSN 6145-01-531-8916
NSN 5895-01-536-5811
NSN 6220-01-183-1732
NSN 5905-00-126-8846
NSN 6240-01-363-8258